| 摘要 |
PROBLEM TO BE SOLVED: To execute sintering so as not to develop partial temp. difference in a die as little as possible at the time of electrically sintering by abutting electrodes on the side surface of a die while pressing powdery material in the cylindrical die. SOLUTION: The powdery material 28 in the die 25 is heated by abutting one pair of electrodes on the side peripheral surface of the cylindrical die 25 incorporating the powdery material 28 under pressing and supplying the electric current to the die 25, and thus, the sintered body is formed. In such a case, in order to execute the electrical sintering with one pair of electrodes as the above method, two sets of faced one pair of electrodes 19a, 19b (l9c, 19d) are arranged at the periphery of the die 25 under condition of abutting on the whole side surface of the die 25 and further, the current supply to the one pair of electrodes 19 in each set is mutually changed. By this method, since the electric abutting points of the electrodes 19 with the lapse of time are changed, the development of partial temp. difference in the die 25 can be restrained in sintering. |
